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Showing 1 to 5 of 5 for “"computer relaying"”.
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Computer relaying for EHV/UHV transmission lines
As the power systems grow, system connections become more complex. Due to cost and environmental concern, more and more parallel lines and series compensated lines may be installed in the system. In order to efficiently use the transmission network, more nonlinear flexible devices such as the phase …
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Application of Kalman filtering in computer relaying of power systems
… of the post-fault currents and voltages for computer relaying purposes of power systems are presented. As a prerequisite for the Kalman-filtering implementation, the random description of the fault-induced noise signals was quantitatively studied. Empirical formulas that describe the random …
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Mimic circuit simulation in real time
… instead of the analog Mimic circuit in distance computer relaying. Four variations of the algorithm were derived and tested to determine the best compromise between time response and noise sensitivity. The relay hardware is taken into consideration for the derivations to avoid adding any hardware …
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Adaptive optimal control of AC/DC systems
… and currents, first developed in the field of computer relaying. The real-time measurements provides a term in the control law to compensate for inaccuracies following departure from the operating point. The control criterion is to damp out the electromechanical oscillations following a …
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Distance Protection Aspects of Transmission Lines Equipped with Series Compensation Capacitors
In order to meet the high demand for power transmission capacity, some power companies have installed series capacitors on power transmission lines. This allows the impedance of the line to be lowered, thus yielding increased transmission capability. The series capacitor makes sense because it's …